Add ability to specify gyp dir to gyp_to_android.

When running gyp_to_android inside a Skia tree, it uses the gyp program
in third_party/externals. Inside an Android tree, we need to use a
different location for gyp (the Android copy of Skia, in external/skia,
does not contain third_party/externals).

The bot handles this by importing gyp_to_android and running its main
function directly.

Add command line arguments so a human can directly run gyp_to_android.

Review URL: https://codereview.chromium.org/864503002
1 file changed